Specifications
ETSI
Final draft ETSI EN 300 328 V1.8.1 (2012
-
04)
56
The measurement procedure shall be as follows.
5.3.10.2.1.1 Pre-scan
The test procedure below shall be used to identify potential unwanted emissions of the UUT.
Step 1:
The sensitivity of the spectrum analyser should be such that the noise floor is at least 12 dB below the limits given in
tables 1 or 4.
Step 2:
The emissions over the range 30 MHz to 1 000 MHz shall be identified.
Spectrum analyser settings:
• Resolution bandwidth: 100 kHz
• Video bandwidth: 300 kHz
• Detector mode: Peak
• Trace Mode: Max Hold
• Sweep Points:
9 970
NOTE 1: For spectrum analysers not supporting this high number of sweep points, the frequency band may need to
be segmented.
• Sweep time: For non continuous transmissions (duty cycle less than 100 %), the sweep time
shall be sufficiently long, such that for each 100 kHz frequency step, the
measurement time is greater than two transmissions of the UUT.
For Frequency Hopping equipment operating in a normal operating (hopping not
disabled) mode, the sweep time shall be further increased to capture multiple
transmissions on the same hopping frequency in different hopping sequences.
Allow the trace to stabilize. Any emissions identified during the sweeps above and that fall within the 6 dB range below
the applicable limit or above, shall be individually measured using the procedure in clause 5.3.10.2.1.2 and compared to
the limits given in tables 1 or 4.
Step 3:
The emissions over the range 1 GHz to 12,75 GHz shall be identified.
Spectrum analyser settings:
• Resolution bandwidth: 1 MHz
• Video bandwidth: 3 MHz
• Detector mode: Peak
• Trace Mode: Max Hold
• Sweep Points:
11 750
NOTE 2: For spectrum analysers not supporting this high number of sweep points, the frequency band may need to
be segmented.
• Sweep time: For non continuous transmissions (duty cycle less than 100 %), the sweep time
shall be sufficiently long, such that for each 1 MHz frequency step, the measurement
time is greater than two transmissions of the UUT.